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Add worldSpace option for drawing polygons #1

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Add worldSpace option for drawing polygons #1

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24 changes: 18 additions & 6 deletions Sources/kha/graphics2/GraphicsExtension.hx
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Original file line number Diff line number Diff line change
Expand Up @@ -83,32 +83,44 @@ class GraphicsExtension {
/**
* Draws a convex polygon.
*/
public static function drawPolygon(g2: Graphics, x: Float, y: Float, vertices: Array<Vector2>, strength: Float = 1) {
public static function drawPolygon(g2: Graphics, x: Float, y: Float, vertices: Array<Vector2>, strength: Float = 1, ?worldSpace: Bool = false) {
var iterator = vertices.iterator();
var v0 = iterator.next();
var v1 = v0;

while (iterator.hasNext()) {
var v2 = iterator.next();
g2.drawLine(v1.x + x, v1.y + y, v2.x + x, v2.y + y, strength);
if (worldSpace)
g2.drawLine(v1.x, v1.y, v2.x, v2.y, strength);
else
g2.drawLine(v1.x + x, v1.y + y, v2.x + x, v2.y + y, strength);
v1 = v2;
}
g2.drawLine(v1.x + x, v1.y + y, v0.x + x, v0.y + y, strength);
if (worldSpace)
g2.drawLine(v1.x, v1.y, v0.x, v0.y, strength);
else
g2.drawLine(v1.x + x, v1.y + y, v0.x + x, v0.y + y, strength);
}

/**
* Draws a filled convex polygon.
*/
public static function fillPolygon(g2: Graphics, x: Float, y: Float, vertices: Array<Vector2>) {
public static function fillPolygon(g2: Graphics, x: Float, y: Float, vertices: Array<Vector2>, ?worldSpace: Bool = false) {
var iterator = vertices.iterator();
var v0 = iterator.next();
var v1 = v0;

while (iterator.hasNext()) {
var v2 = iterator.next();
g2.fillTriangle(v1.x + x, v1.y + y, v2.x + x, v2.y + y, x, y);
if (worldSpace)
g2.fillTriangle(v1.x, v1.y, v2.x, v2.y, x, y);
else
g2.fillTriangle(v1.x + x, v1.y + y, v2.x + x, v2.y + y, x, y);
v1 = v2;
}
g2.fillTriangle(v1.x + x, v1.y + y, v0.x + x, v0.y + y, x, y);
if (worldSpace)
g2.fillTriangle(v1.x, v1.y, v0.x, v0.y, x, y);
else
g2.fillTriangle(v1.x + x, v1.y + y, v0.x + x, v0.y + y, x, y);
}
}